Journal of the Science of Design 7(2) 2_67-2_74 2023年11月30日 査読有り責任著者
In this study, to clarify factors related to impression evaluation of decorative films, we focused on spectral radiance ratio characteristics and attempted to clarify the relationship between these characteristics and impression evaluation. As a result, two characteristics: the "wavelength-dependent type", in which the spectral radiance ratio characteristic varies significantly with the magnitude of the wavelength, and the "angle-dependent type", in which it varies significantly with the angle of measurement, are each related to impression evaluation, such as depth perception. The former feature can be expressed as the difference between the maximum and minimum values of the spectral radiance ratio at highlights and was found to be related to saturation. On the other hand, the latter feature can be expressed by the difference between the maximum values of the spectral radiance ratios for semi-shades and shades, and was shown to be related to the difference in their luminance. Thus, the impression of the decorative film can be expressed by the spectral radiance ratio.
Journal of the Science of Design 7(2) 2_59-2_66 2023年11月30日 査読有り責任著者
Previous studies have reported that depth perception is a major factor in the visual impression evaluation of various materials, such as wood and metal, and that the spectral radiance ratio may be involved in the depth perception evaluation of red materials. In this study, we focused on decorative films, that have been widely used in products in recent years and investigated the influence of their transparent layers and color on the spectral radiance ratio. As a result, it was confirmed that the thickness of the transparent layer on the surface of most decorative films has almost no effect on the spectral radiance ratio. It was also found that the spectral radiance ratio can be expressed in various colors, such as red, green, and blue. Furthermore, it was shown that the difference between the maximum and minimum values of the spectral radiance ratio under the highlight, which is close to the specular reflection light from the decorative films, has a high correlation with saturation and is related to impression evaluation.
The purpose of this study is to propose an environmentally-friendly detergent container without painful process such as refill. In addition, it also aimed to minimize the volume of container when it discarded. Laminated film was used for the container to reduce the effects on the environment. At first, it was investigated the way of deformation by axial compression force. Subsequently, the bottom shape of the container was discussed. As the results, it was clarified that the desirable deformation are performed using accordion wall with rectangular bottom shape. Moreover, the effects of number of tiers of wall on stability and usability of the container were discussed. Finally, we proposed a container which achieves the aims.
This paper aimed to propose playthings focused on those sound qualities of materials. At first, it was carried out the survey on plays of kindergarten students and their interest to sound. Subsequently, it was investigated that what the guardians of them desire their children's play. As the results, it was found that the guardians desired for their children to encourage their creativity and/or acquire cooperativeness through playing with a plaything. Consequently, two kinds of playthings were proposed to satisfy demands of both the students and their gurdians. Finally, the effectiveness of those was confirmed by experiments with kindergarten students.
The purpose of this paper is to clarify the suitable combination of fabric materials for different body regions. Fifteen kinds of woven fabrics as samples were made with cotton thread and jute yarn. The subjects evaluated tactile impression of the samples using their body regions ; palm, medial side of the forearm, back of the thigh and planta pedis. Obtained results show a strong correlation between the evaluations for comfort by medial side of the forearm and those by back of the thigh. Moreover, it was clarified the physical properties affected on tactile impression of fabrics.
A simple mechanism of steering function was proposed in order to simplify steering structures and to reduce the weight of the structures. The simple steering mechanism consists of two elastic front arms instead of the usual complex system that includes many rigid parts. A tricycle with the elastic front arms, which was composed by two front wheels and one rear wheel, was investigated to explore the possibility of the elastic steering mechanism. To examine the dynamic behavior of the tricycle, a small radio-controlled model and an actual tricycle that should be able to be controlled by a rider on the real tricycle were constructed. The traveling examinations into both the models showed that the elastic steering mechanism could have some practical characteristics.
The purpose of this research is to improve the running performance of existing tricycle. Especially, this research was carried out from the viewpoint of the improvement on the curving performance and running performance on off road. First, we noticed the front wheel drive as one of the improvement on the running performance. This effectiveness in the off road is shown. Next, by the motion of rear wheels It is possible to expect the improvement on the curving performance. The two kind tricycles were constructed and tested practically to investigate the performances in this reseach. This rear frames of the two tricycles were made with bamboo and torsion coiled springs, respectively.
This research discussed about the effect of patterns and materials on the perception of tactile tiles for guiding visual impaired people. Tactile tiles with different textures and number of protrusions were prepared for samples. The samples were made of four kinds of materials such as plastic, rubber, metal and wood. Subsequently, nine persons without visual problems and eleven visually handicapped, evaluated the possibility of information transfer using the tactile tiles. As a result, it was suggested that the combination of material and pattern could transmit the information such as "danger", "goal", "for men" and "for women"
The purpose of this research was to solve the problems in the use of the baby stroller. The approach was conducted by thinking about the material and the frame shape. The first stage of the research was to carry out a questionnaire to identify the problems in the use of the baby stroller. Then, a baby storoller designed as a sling using three dimensional knitting and a stroller flame was produced. Finally, a road test with the baby stoller was carried out. The following results were obtained : (1)The baby's body was sufficiently supported by the knitting; (2)The baby's body vibration was greatly reduced with the new design of the baby stoller.